Grinder cutter



April 1o, 192s. 1,666,014

J. H. KERSHNER f @KINDERi CUTTER Filed A'ug, 51, 1925 2 Sheets-Sheet 1@Uniway/1' u April 10, 1926. 1,666,014 l J. H. KERSHNER GRI NDER`CUTVTER Filed Aug 31.` 1925 2 sneetsfsne'et 2 i `invention kaimstoprovide aysim'ple Patented Apr. 10, 1928;v

JOHN HENRY KERSHNER, orlnon'ron, Kansas. i

GRnDER corran.

' mutation iegiisugust 31,4 i925. semaine. sacar. y', t

buteective meansrwhereby, in singleina-4 chine, stu such asensilagen'iayf be cut, 1t

y being.4 possible, fal'so, to, grind `feed inthe 'tion ,andarrangenient of parts` and in thel i within the scopelof; what is claimed,without ab machine. t

,Itis within the l,province of therdisclosure tol improve generally .andto enhance .the `utility otdevicesfof that type to which the inventionappertain's.,

With .thefabove an ceeds, they .invention resides lin the combinadetailsvof construction hereinafter described .and 'vclaiined, 't being`understoodr that [changes in the precise Vembodiment of the reinventionherein y"disclosed, may be made departingzfroni thespirit vof theinvention.

, z In the accompanying ldrawings f ,Figure 1 shows iny side elevation,a device Y constructed in acctn'danfrze *with the inven tion.; 4'Figure2 is lan end elevatlon;l Figure f 3is Yafdiagrammiatieview illustratingthe l t tiongijligure''isaisection taken about on. u 3.0

relation `which exists v'between the working edgesof. adjacent blades,on the rotor; I Fig- .ure I4 lis-asection takeny about on the` line i,

` foff Figure 2, parts remaining in eleva'- thegline .of Figure 4;yFigure 6 is an f enlargedE sectional-,viewlshowing a portionofqthefconcave; Figure? is a' sectionalfview nlarsd from' Figure 4f .,Incarrying out,` thev invention, there t is l*provided* a rameil. So farasmaterial to` x the present discussion, thee frame includes i. endbarsjAandside bars 2. The frame. 1

vcarriesv ajhousing' -4.'l"he housing 4 ern-- bodies la discharge,spouty isecured@ at 6 tol .thesidebars 2 and tothe end bars'3 of y.thedrame 1.f Thehousing i4 embodies -a cap7-joffapproximately'semi-circular shape.

' .The capii hasside, vcleats 8 `secured by bolts brackets 10 Vand 11aresecured at12to the 9er. otherwise to the side b arsu2'of the frame 1,the, cap-thus beingjremovable, `Angle respective endbarsg3 of ythezranne1'. 1A

vremovableconcave14is provided.` 4The concave 14is located inthey spout5 and hasin- 4wardly projecting burrs- 15. The openings th-rough theburrs` 15 iiare at their outer ends, asshown at 16, .sothat the groundfinaterial'n'iay free itself readily., Securing velements lconnect the;ends of the concave 14 vvitliftheJorackets'll.v kA fixed'bladej. 18

, ,Y d otherobjectsin view which 4will 1 appeary as the descriptionpro-y is secured atl 19 to the bracket l11 Tandis disposed above theintakeend vof thecouff- The numeral`20 marks anfinclinedchute which.discharges into thelhousing .4, yacross the blade 18',` and at theintake; end ofl they concave ,14.y The 'chute-2O is connectedby U-shapedlstraps 22-to a` hopper 23,.:V .The L hopper 23 dischargespartly ontokthe chute cover plate having ianges 26 whichareconnect'ed at 27v4to theside walls "of the chute.

"A cross piece`28 is `connectedtothe rbottom ofthe chute 20.Inclined*supports 29 `eigk tend betweenthe cross ypiecez-28andfone fofthe straps-22, the strapsVK 22 being joined byanchor strips 430 whichyform places of attachment for adjustabletiesSL-Suchjas 'l bolts,thef.saine beinginounted at their outer ends inthean'gle bracket 1Y0.

Bearings ,32,are ,secured; lto .the side for the lubrication. of ashaftlj34fwhich is journaled in the bearings 32, 'Any suitable means 35.may be `provided whereby rotation maybe imparted to the shaft 34,v iThe shaft 34 carries agrotor`36 Alocated inthehousing i i 4fandcooperating with thelconcavefl4.` -Ro tor 3,6includes a diskvlikebody-37 having lateralhubs 3,8, arms '391 beingjsecuredjre- -movablyat`40 to opposite vsides ofthe body lbeinginclined .in oppositedirections, transversely of therotor,`r as Figure'3 will clearly"show,those edgesl of theVj blades being";pr0

`2 of the frame 1 and carry dopel cups 3 3 loof vided, with teeth V44,which `are sharpened" upon their edges,as1shownat 445. y If iensilage.or the like is ytosbe cut, .the

concave 14 preferably -i-s removed, the enl, silagevbeing fedk along.,ythe chutef20,wthe` edges of the teeth 44 ofthe bladesy42 on the .rotorSG-veooperating'with the -xed' "I blade k18 to sever the material, thematerial passing downwardly-and outwardly, through the lspout 5:, In theevent that material is to be ground, the concave 14 remains in place.rIhe material to be ground can be dumped ldirectly into the housing4through the hopper 23, or, if desired, it can be fed in through thechute.A 20. When the rotor 86 is in operation, t-he blades 42 carry thematerial over the burrs l5 of the'concave 14, the finely dividedmaterial flowing downwardly through the flared openings 16 of theconcave.

Because the Vworking edges ofthe b-lades 42 'are inclined'inoppositefdirections transversely of the rotor, because the said edgeshave'teeth'44, and because the edges of the teeth aresharpened as at 45,a very effective cut is secured'when the blades l42 of' the'iotorcooperate with the'iixed blade 18: and, furthermore, because the'blades42 are constructed as described, those blades, in combination with theburrs ofthe concave 14, vare peculiarly efficient, the material beingmoved 'laterally from side to side, torn by the teeth 44, rubbedby theburrs 15 and cut bythe edges45 of the teeth. Owing to the way in whichthe working edges of the blades are inclined, sharpened, and toothed,the'beneftof adraw cut is obtained, and at the same time, the materialis' worked toward the center of the chute 23, or toward lthe centerof'the chute 20, and a clogging at thesides of the chute is avoided. It hasbeen found by experiment that a machine embodying the featuresabovedescribed with respect to theknives or'blades, will operate withapproximately 25% less power than is required when `the shape oftheblades or knives 'is changed from that shown in Figure 3 ofthe drawings.

I claim 1."In a device ofthe class described, a support,'a chute carriedby the support, a fixed blade at the inner end of the chute, and a rotorjournaled on the support and provided with circumferentially extendedblades co- 'acting with the fixed blade, the working edges lof adjacentbladeson the rotor being inclined in opposite directions transversely`of the rotor thereby to obtain the benefit of a -draw out, and to keepthe material central- -Iixed'blade atthe innerend of the chute, and

4a rotor Vjournaled `on the support and provided with circumferentiallyextended 'blades coactingi with the fixed blade, the

Working edges ofadjacent blades on the rotorbeing inclined in oppositedirections transversely of 'the rotor, said edges being provided withteeth, the above-defined construction of the working edges of the bladesbeing such that a draw cut will be effected -and',vat the sameti'me, thematerial will be port, achute carried bythe support, a fixed centralizedwith respect to the chute, to pre vent a crowding of the material atlthesides of' the chute.

3. In a device of the class described, a sup` blade at the inner end ofthe chute, and a rotor ouinaled on the support and provided withcircumferentially extended blades co- `acting with the fixed blade, theworking edges of adjacent blades on thev rotor being inclined inopposite directions transversely ofthev rotor, those edges'beingprovided with teeth, and the `-edges of the. Ateeth being sharpened, theaforesaidconstruction of the working edges of the blades being such thata draw cutwill be effected, and, atthe same time, the material `will beycentralized with respect tothe chute, thereby to avoid a crowding at thesides of the chute.

4. Ina device of the class described, a support, a concaveon thesupportand having inwardly projecting burrs, a chute, a rotorcooperating with the ychute journaled on the support and 'supplied withcircumferentially extendedblades coacting with the burrs, the workingedges of the adjacent blades beinginclined in opposite directionstransversely ofthe rotor, lthe aforesaidv inclination of' the edgesofthe blades operating to afford a draw cut andto cause the material tobe advanced toward the center of the chute, thereby7 avoiding acloggingat thesides of the chute.

5. Ina device of the class'described, a 'sup- /port, a concave 0n thesupport and having 100 inwardly 'projecting burrs,a chute discharging onthe concave, and a yrotor journaled on the support and supplied withvcircumferentially extended blades coacting lwith "theburrs, the workingedges of adjacentblades being inclined in opposite directionstransversely of the rotor, the said 'edges ybeing supplied with teeth,the aforesaid construc- 'tion of the working edges of the blades beingsuch that a draw cut will'be afforded, and 11u being such that thematerial will be forced toward the center of the chute, therebyto avoida clogging at the sides of the chute.

6. Ina device of theclass described, a support, a concave on the supportand having inwardly projecting burrs, a rotorjournaled onthe supportand'supplied lwith circum ferentially extended blades coactingwith theburrs, the working'edges of adjacentblades 'being inclined in oppositedirections circum- *12u ferentially of the rotor, the said edges beingprovided with teeth, andtheedges of the Vteeth being sharpened, and achute discharging on the rotor, the aforesaid construction of theworking edges of the blades affording 126 a draw cut and preventinga-clogging of the material at the sides of the chute. l

7. In a device of the class described, Aa

support, `a concave carriedy by the support, a

rotor journaled on the support, a chute dis- '1an 1,666,014 j v i 3,

charging upon, the rotor and the concave, the ytion of the blades attheirv edges'beingfskch i' concave being "provided with projectinganthat a draw cut Will be afforded,l and, at'the? 10j' nular burrshaving openings which Hare out- Sametime, lthe material Will be 'carriedtoe` Y v. Wardly, the blades vcooperatil'ig with the in- ,Ward thecenter lof Jthe chute, thereby tol v- I ner ends of the burrs', theedges of adjacenty av01d a clogging at the sides of the chute.` i

blades. being oppositely'inolned, and being y In testimony that Iclaim'the foregoing as i I provided with teeth,` the said edgesol themyown, I have hereto axedmy si ature.` K blades being sharpened, and theeonetruc-l Y, l JOHN HENRY KERSH ERf

